<html>
	<body>
		<p>
		Nothing
		</p>
		<button onclick="changeURL();">Change1</button>
		<button onclick="changeURL2();">Change2</button>
		<script type="text/javascript">
			function changeURL()
			{
				var search = document.location.search;
				console.log("changeURL="+search);
				document.location.search += "&locale=a";
			}
			function changeURL2()
			{
				var search = document.location.search;
				console.log("changeURL2="+search);
				document.location.search += "&locale=b";
			}
		</script>
	</body>
</html>